Grade 9 Online Handouts for the 3rd Quarter

Lesson 3.01: Conditions for a Quadrilateral to be a Parallelogram

Lesson 3.02: Proving That a Quadrilateral is a Parallelogram

Lesson 3.03: Using Properties to Find Angle Measures in Parallelograms

Lesson 3.04: Using Properties to Find Measures of Sides and Other Quantities in Parallelograms

Lesson 3.05: Proving Theorems on Rectangles

Lesson 3.06: Proving Theorems on Rhombuses

Lesson 3.07: Proving Theorems on Squares

Lesson 3.08: Proving the Midline Theorem of Triangles and Trapezoids

Lesson 3.09: Applying the Midline Theorem in Finding Missing Parts of a Triangle

Lesson 3.10: Applying the Midline Theorem in Finding Missing Parts of a Trapezoid

Lesson 3.11: Proving Theorems on Trapezoids

Lesson 3.12: Proving Theorems on Kites

Lesson 3.13: Solving Problems Involving Parallelograms

Lesson 3.14: Solving Problems Involving Trapezoids

Lesson 3.15: Solving Problems Involving Kites

Lesson 3.16: Defining and Illustrating Proportions

Lesson 3.17: Illustrating the Congruence of Corresponding Angles in Similar Triangles

Lesson 3.18: Illustrating the Proportionality of Corresponding Sides in Similar Triangles

Lesson 3.19: Proving the SAS Similarity Theorem

Lesson 3.20: Proving the SSS Similarity Theorem

Lesson 3.21: Proving the AA Similarity Theorem

Lesson 3.22: Proving the Right Triangle Similarity Theorem

Lesson 3.23: Proving Special Right Triangle Theorems

Lesson 3.24: Applying the SAS Similarity Theorem to Show Triangle Similarity

Lesson 3.25: Applying the SSS Similarity Theorem to Show Triangle Similarity

Lesson 3.26: Applying the AA Similarity Theorem to Show Triangle Similarity

Lesson 3.27: Applying the Right Triangle Similarity Theorem to Show Triangle Similarity

Lesson 3.28: Applying Special Right Triangle Theorems to Show Triangle Similarity

Lesson 3.29: Applying Triangle Proportionality Theorem to Solve Problems Involving Proportions

Lesson 3.30: Applying Converse Triangle Proportionality Theorem to Solve Problems Involving Proportions

Lesson 3.31: Applying Triangle Angle Bisector Theorem to Solve Problems Involving Proportions

Lesson 3.32: Proving the Pythagorean Theorem

Lesson 3.33: Solving Problems Involving Triangle Similarity

Lesson 3.34: Solving Problems Involving Right Triangles